Pen cap



FIG. 1 is a bottom front right perspective view of a pen cap showing my new design;

FIG. 2 is a top front right perspective view thereof;

FIG. 3 is a right rear top perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom front right perspective view of the pen cap of FIG. 1 shown attached to a pen.

Portions shown in even-length broken lines are environment. Broken lines of uneven length illustrate the boundary of the claimed design. The broken lines form no part of the claim. 

CLAIM The ornamental design for a pen cap, as shown and described. 